Container for transport of mastic asphalt and like bulk material required for laying streets

ABSTRACT

The invention relates to containers for the transport of mastic asphalt or like bulk material required for laying streets. The container is provided with stirrer-means for preventing separation phenomena and comprises at least two part-containers each with part cylindrical walls joined together to define a container space, the axes of the part-cylinders coinciding with the axes of rotation of two stirrer-arm assemblies. The arms of the stirrer-arm assemblies move along paths which intersect in the transition zone in the container space where the interior of one part-container merges with the interior of the other.

United States Patent [1 1 Beutler CONTAINER FOR TRANSPORT OF MASTIC ASPHALT AND LIKE BULK MATERIAL REQUIRED FOR LAYING STREETS [76] Inventor: Wolfgang Beutler, Welterpfod 53, 1

Berlin 48, Germany [22] Filed: June 13, 1972 [2]] Appl. No.: 262,254

[52] US. Cl 259/157, 259/104, 259/178 A,

259/179 [51] Int. Cl B011 7/20, BOlf 7/32, B286 5/46 [58] Fitld of Search... 259/6, 21, 41, 66, 67, 259/104, 157,161,178 A, 179

[56] ReferencesCited UNITED STATES PATENTS 2,727,732 12/1955 Plumb et al 259/104 X 2,757,912 8/1956 Madsen i 259/179 2,098,483 11/1937 Bonham 259/179 X 463,335 11/1891 Mulford 259/104 11 Apr. 16, 1974 1,081,516 12/1913 Reinohl ..259/l04 Primary ExaminerRobert W. Jenkins Assistant Examiner-Alan I. Cantor Attorney, Agent, or Firm-Smythe & Moore [5 7] ABSTRACT The invention relates to containers for the transport of mastic asphalt or like bulk material required for laying streets. The container is provided with stirrer-means for preventing separation phenomena and comprises at least two part-containers each with part cylindrical walls joined together to define a container space, the axes of the part-cylinders coinciding with the axes of rotation of two stirrer-arm assemblies. The arms of the stirrer-arm assemblies move along paths which intersect in the transition zone 1 in the container space where the interior of one partcontainer merges with the interior of the other.

6 Claims, 3 Drawing Figures SHEET 1 BF 2 PATENTED APR 1 6 i974 PATENTEUAPR 16 1974 sum 2 or 2 The invention relates to a container provided with a vertical stirrer for preventing separation phenomena, for transport of mastic asphalt or like bulk material required for laying streets.

For the above purposes it is known to provide a cylindrical container having a centrally arranged stirrer shaft which is led out at the ends of the container through glands. Such a container is not capable of giving complete satisfaction, in as much as the glands never seal perfectly and are liable to need maintenance.

The said disadvantage does not arise in the case of a container which is also cylindrical but has a continuous bottom and a stirrer journalled in the upper portion of the container.

Nevertheless the two known containers do not satisfy the requirements of modern technology. The reason for this is that their effective capacity is limited. That is, it cannot be increased substantially above eight tons, since the diameter of the container is limited by the permissible overall width of the transporting vehicle used and the height of the container by the height of the vehicle and by an allowable position'of the centre of gravity.

A further disadvantage of the known containers is that the mixing effect of the stirrer is insufficient, since the mastic asphalt circulates with the arms of the stirrer. Finally in the known constructions it shows up as disadvantageous that because of the necessity of emptying the container to the rear, and on account of the cylindrical shape of the container. the weight rests mainly on the rear axleof the transport vehicle.

The object of the invention is to create a container of the type described above, which does not exhibit the disadvantages indicated. This problem is solved in accordance with the invention by a new container consisting of at least two part-containers with walls formed of part-cylinders joined together to define a container space, and the axes of the part-cylinders coinciding with the axes of rotation of two stirrer arm assemblies, the arms of which move along paths which intersect in the transition zone from one part-container to the other. i a

The container in accordance with the invention has the advantage that its effective capacity, independent of the width of the vehicle used, can be made within wide limits to suit practical requirements.

The invention is further described below with reference to the embodiment illustrated by way of example in the accompanying drawing, in which FIG. 1 is a cross-sectional view taken longitudinally of a container vehicle FIG. 2 is a horizontal section taken along the line II--II of FIG. 1, and

FIG. 3 shows a detail view of the container of FIGS. 1 and 2, at the region indicated by Illia FIG. 1.

The walls of the container are formed of two partcylindrical shell plates 1 to which are attached bottoms consisting of part-bottoms 2 and 3. The part-bottoms 2 are formed of domed bottom-plates and the partbottoms 3 of frusto-conical edge-plates. A stirrer assembly is associated with each part-container, which includes three bearers 4 placed vertically 120 apart, to

which horizontal stirrer-arms 5 are attached. The upper stirrer-arms carry stripper-plates 6 and conveyor-plates 7. The lower stirrer-arms are provided with stripperplates 6 and 8. In the centre of each part-container an additional stripper 9 is arranged. The stripper-plate 8 and the stripper 9 serve to prevent sticking of the mastic asphalt to the bottom of the container. The conveyor-plate 7 introduces a vertically directed circulation into the mass of mastic asphalt.

The bearers 4 are connected via ring-plates 10 in the cover of the container, with the ring Ila of a ball-race crown 11, the other ring 11b of which is secured to the container. The rings 11a of the ball-race crowns II display at their outer edges teeth which interengage. One of the rings 1 1a is connected via a gear 12 and vee-belts to a motor 13.

Under the container is a heating device with which is associated a propane burner system. The exhaust gases produced by the heating are led into a cavity 16 beneath the floor plates 2 and 3 and then through openings 15 into an exhaust gas channel which is connected to the exhaust gas chimney 17.

Openings l8 serve for filling the container, and a drain 19 for withdrawing the mass of mastic asphalt.

The container illustrated in the drawing consists of two part-containers. It is quite possible to provide three or more part-containers instead of two, in order to increase the effective capacity of the container in this way. The stirrers do not necessarily have to be suspended from turntable rings. The employment of turntable rings with toothed rings, however, offers the advantage that the movement of the stirrer-arms of the individual stirrers can be set relative to one another in a simple manner. A further advantage is that the bearings cannot be impaired by the temperatures of the mass of mastic asphalt.

Referring to FIG. 3 the slope (a) of the conical bottom parts 3 is equal to the slope of the tangent drawn with the surface of the dome shaped bottom plate 2 at the point of intersection, the tangents being drawn in towards the centre of one of the part cylindrical shell plates 1. The stripper plates 8 may conform with the shaping of the bottom plates in the region depicted in .FIG. 3. x

I claim: a

l. A container provided with stirrer means for preventing separation phenomena, for the transport of mastic asphalt or like bulk material required for laying streets, the container comprising at least two partcontainers each with part cylindrical walls joined together to define a container space, the axes of the partcylinders coinciding with the axes of rotation of two stirrer arm assemblies, which are each attached at the upper end of each part-container to turnable rings driven by a motor to rotate, the arms of the stirrer arm assemblies moving along paths which intersect in the transition zone in the container space where the interior of one part-container merges with the interior of the other.

2. A container as defined in claim 1, wherein said rings carry external teeth which interengage in the zone of transition between one part-container to the other part-container.

3. A container as defined in claim 1, wherein said stirrer arms are at the upper end of each part-container attached to turnable rings by means of three vertical bearers which are arranged apart in the direction of rotation and which extend into the interior of each part-container, the bearers being connected to the rings and each stirrer arm at least being attached to two of said bearers.

4. A container as defined in claim 1, wherein said stirrer arms are at the upper end of each part-container attached to turnable rings by means of three vertical bearers which are arranged 120 apart in the direction of rotation and which extend vertically into the interior of each part-container, the bearers being connected to the rings and carrying at least three horizontal stirrer arms for each part-container interior, which arms are arranged offset from one another in the vertical direction.

5. A container as defined in claim 1, wherein said stirrer arms move along paths which intersect in the transition zone in the container space where the interior of one part-container merges with the interior of the other, the bottom of the container being formed of part spherical bottom parts domed into the interior of the part-containers also and conically shaped parts sloping in to adjoin the respective dome shaped bottom parts and partially overly the dome shaped parts. the circular edges of the dome shaped bottom parts which do not underlie the conical shaped bottom parts, adjoining the zone of the transition from one part-container to the other part-container, and the slope of the conically shaped part bottom being equal to the slope of the tangent drawn to the dome shaped bottom parts at the point of contact between their edges in the direction towards the center of one part-container.

6. A container as defined in claim 5, wherein the cavities bounded by the covered dome shaped part bot toms and the conical part-bottoms which cover them form exhaust channels for the combustion gases of a heating device arranged underneath the container. 

1. A container provided with stirrer means for preventing separation phenomena, for the transport of mastic asphalt or like bulk material required for laying streets, the container comprising at least two part-containers each with part cylindrical walls joined together to define a container space, the axes of the part-cylinders coinciding with the axes of rotation of two stirrer arm assemblies, which are each attached at the upper end of each part-container to turnable rings driven by a motor to rotate, the arms of the stirrer arm assemblies moving along paths which intersect in the transition zone in the container space where the interior of one part-container merges with the interior of the other.
 2. A container as defined in claim 1, wherein said rings carry external teeth which interengage in the zone of transition between one part-container to the other part-container.
 3. A container as defined in claim 1, wherein said stirrer arms are at the upper end of each part-container attached to turnable rings by means of three vertical bearers which are arranged 120* apart in the direction of rotation and which extend into the interior of each part-container, the bearers being connected to the rings and each stirrer arm at least being attached to two of said beArers.
 4. A container as defined in claim 1, wherein said stirrer arms are at the upper end of each part-container attached to turnable rings by means of three vertical bearers which are arranged 120* apart in the direction of rotation and which extend vertically into the interior of each part-container, the bearers being connected to the rings and carrying at least three horizontal stirrer arms for each part-container interior, which arms are arranged offset from one another in the vertical direction.
 5. A container as defined in claim 1, wherein said stirrer arms move along paths which intersect in the transition zone in the container space where the interior of one part-container merges with the interior of the other, the bottom of the container being formed of part spherical bottom parts domed into the interior of the part-containers also and conically shaped parts sloping in to adjoin the respective dome shaped bottom parts and partially overly the dome shaped parts, the circular edges of the dome shaped bottom parts which do not underlie the conical shaped bottom parts, adjoining the zone of the transition from one part-container to the other part-container, and the slope of the conically shaped part bottom being equal to the slope of the tangent drawn to the dome shaped bottom parts at the point of contact between their edges in the direction towards the center of one part-container.
 6. A container as defined in claim 5, wherein the cavities bounded by the covered dome shaped part bottoms and the conical part-bottoms which cover them form exhaust channels for the combustion gases of a heating device arranged underneath the container. 